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If a ,b ,a n dc are in A.P. p ,q ,a n dr...

If `a ,b ,a n dc` are in A.P. `p ,q ,a n dr` are in H.P., and `a p ,b q ,a n dc r` are in G.P., then `p/r+r/p` is equal to `a/c-c/a` b. `a/c+c/a` c. `b/q+q/b` d. `b/q-q/b`

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